THE IRAS 08589-4714 STAR-FORMING REGION

HUGO P. SALDAÑO; JAVIER VASQUEZ; MERCEDES GOMEZ; CRISTINA E. CAPPA; NICOLAS DURONEA; MÓNICA RUBIO

REVISTA MEXICANA DE ASTRONOMíA Y ASTROFíSICA

UNIV NACIONAL AUTONOMA MEXICO

Lugar: México; Año: 2017 vol. 53 p. 3 - 16

0185-1101

We present an analysis of the IRAS 08589-4714 star-forming region. This region harbors candidate young stellar objects identified in the WISE and Herschel images using color index criteria and spectral energy distributions (SEDs). The SEDs of some of the infrared sources and the 70 microns radial intensity profile of the brightest source (IRS 1) are modeled from Herschel fluxes using the one-dimensional radiative transfer DUSTY code. For these objects, we estimate the envelope masses, sizes, densities, and luminosities which suggest that they are very young, massive and luminous objects at early stages of the formation process. Color-color diagrams in the bands of WISE and 2MASS are used to identify potential young objects in the region. Those identified in the bands of WISE would be contaminated by the emission of PAHs. We use the emission distribution in the infrared at 70 and 160 microns, to estimate the dust temperature gradient. This suggests that the nearby massive star-forming region RCW 38, located ~ 10 pc of the IRAS source position may be contributing to the photodissociation of the molecular gas and to the heating of the interstellar dust in the environs of the IRAS source.